Using the **engine as a brake** is a technique that helps reduce the vehicle's speed without relying exclusively on the wheel brakes. This is achieved by stopping acceleration, allowing the engine to hold back the vehicle. It is especially useful on **steep descents**, as it avoids excessive use of the brakes, which can lead to their **overheating** and a decrease in their effectiveness.

- **Braking smoothly and in a controlled manner** is essential for safety. Using the engine as a brake contributes to this, as it allows for a gradual reduction in speed without overloading the brakes.
- Excessive use of the brakes can cause them to **overheat** and perform worse, especially on poorly maintained roads or long descents.

Therefore, using the engine as a brake is a recommended practice to maintain brake effectiveness and ensure safe driving.